package com.hyl.auth.config.security.handler;

/**
 * @Description TODO
 * @Author hyl
 * @Date 2023/6/20 13:36
 **/

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.hyl.auth.config.redis.RedisService;
import com.hyl.auth.entity.User;
import com.hyl.auth.utils.JwtUtils;
import com.hyl.auth.utils.LoginResult;
import com.hyl.auth.utils.ResultCode;
import io.jsonwebtoken.Jwts;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * 登录认证成功处理器类
 */
@Component
public class LoginSuccessHandler implements AuthenticationSuccessHandler {

	@Resource
	private JwtUtils jwtUtils;

	@Resource
	private RedisService redisService;

	@Override
	public void onAuthenticationSuccess(HttpServletRequest request,
	                                    HttpServletResponse response, Authentication authentication) throws IOException,
			ServletException {
		//设置客户端的响应的内容类型
		response.setContentType("application/json;charset=UTF-8");
		//获取当登录用户信息
		User user = (User) authentication.getPrincipal();
		//生成token
		String token = jwtUtils.generateToken(user);
		//把token缓存到redis
		String tokenKey = "token_"+token;
		redisService.set(tokenKey, token, jwtUtils.getExpiration()/1000);
		//设置token签名密钥及过期时间
		long expireTime = Jwts.parser() //获取DefaultJwtParser对象
				.setSigningKey(jwtUtils.getSecret()) //设置签名的密钥
				.parseClaimsJws(token.replace("jwt_", ""))
				.getBody().getExpiration().getTime();//获取token过期时间
		//创建登录结果对象
		LoginResult loginResult = new LoginResult(user.getId(),
				ResultCode.SUCCESS,token,expireTime);
		//消除循环引用
		String result = JSON.toJSONString(loginResult, SerializerFeature.DisableCircularReferenceDetect);

		//获取输出流
		ServletOutputStream outputStream = response.getOutputStream();
		outputStream.write(result.getBytes(StandardCharsets.UTF_8));
		outputStream.flush();
		outputStream.close();
	}
}